Russian investigators concluded that the accident of an S7 Airlines Airbus A.310 at Irkutsk in July 2006 was attributed to an unintentional and uncontrolled action by the crew. It appeared that the nr.1 engine thrust reverser was deactived. When handling the power levers after touchdown to select reverse thrust on the nr.2 engine, the pilot inadvertently moved the nr.1 power lever from idle to significant thrust. This was not noted and the airplane overran the runway, bursting into flames. (MAK)